UK Tax Agency Recorded the Voices of 5.1 Million Brits June 24, 2018 https://www.bleepingcomputer.com/ne...ency-recorded-the-voices-of-51-million-brits/
Everything should be Opt-in only - As bad as Opt-out is, it's better that than nothing at all, but to deceive people about it is pretty darned low. Whoever was responsible for letting this happen should lose their job and be sued out of existence.
To be fair to the HMRC, an astonishing thing but there you are, they have in fact been quite advanced (via partners) in offering U2F options for online authentication. I tend to avoid support lines on the basis of long wait times, impenetrable menus and staff who are on a script and cannot handle real issues. I've also been lied to to often by commercial helplines, so I tend to do stuff in writing.
Thousands tell HMRC to delete voice data January 25, 2019 https://www.bbc.co.uk/news/technology-47001458 Big Brother Watch Press Release: Tax Voice ID scheme faces backlash as thousands delete Voice IDs
ICO Calls Out HMRC for Illegal Biometric Data Collection May 13, 2019 https://www.infosecurity-magazine.com/news/ico-hmrc-illegal-biometric-data-1/